How do I convert ICO to AVIF?

Upload your ICO file above. It is converted to AVIF automatically (change the output format or quality in the Settings tab if you need to), then click Download. There is nothing to install.

Does converting ICO to AVIF lose quality?

AVIF is lossy by default, so some fine detail is discarded to make the file smaller. Raise the quality or switch on lossless in Settings for a closer copy.

Will the AVIF keep the transparent background?

Yes. AVIF supports smooth, partial transparency, so transparent areas stay transparent.

ICO or AVIF: which should I use?

Use ICO for website favicons and Windows app or shortcut icons. Use AVIF for the smallest high-quality images for websites and apps. Keep in mind the main drawback of AVIF: it is slow to create and many editing apps and older devices can’t open it.

An ICO file bundles one picture at several sizes, from 16 to 256 pixels, so browsers and Windows can pick the sharpest version for a tab, bookmark or desktop shortcut.

Is the ICO to AVIF converter free?

Yes. Convert, preview and download a single result without creating an account. Premium adds batch conversion (many files into one ZIP) and larger uploads.

Convert ICO to AVIF — Smallest High-Quality Images

Convert ICO to AVIF online for very small web images that keep transparency. No software to install. Preview one free or batch-convert with Premium.

Drop your ICO file or click to browse

Why convert ICO to AVIF?

Transparent areas stay transparent: AVIF supports smooth, partial transparency just like ICO.
AVIF is made for the smallest high-quality images for websites and apps.

What to expect when converting ICO to AVIF

AVIF uses lossy compression by default; raise the quality or switch on lossless in Settings for a closer copy.
Your original ICO file isn’t changed: you download a new AVIF copy.

ICO vs AVIF

Feature	ICO	AVIF
Full name	Windows Icon	AV1 Image File Format
Origin	Created by Microsoft for Windows icons	Released by the Alliance for Open Media in 2019
Compression	Lossless images at several sizes	Lossy or lossless
Transparency	Yes — smooth, partial transparency	Yes — smooth, partial transparency
Animation	No	Yes
Colour	Full colour with transparency	8, 10 or 12 bits per channel, including HDR
Where it opens	Browsers (as favicon.ico), Windows and icon editors	Current Chrome, Edge, Firefox and Safari 16+; fewer editing apps
Best for	website favicons and Windows app or shortcut icons	the smallest high-quality images for websites and apps
Main drawback	icons are square and at most 256 × 256 pixels	it is slow to create and many editing apps and older devices can’t open it

In short: choose ICO for website favicons and Windows app or shortcut icons; choose AVIF for the smallest high-quality images for websites and apps.

ICO to AVIF for sites that serve their images as AVIF

If your site already serves its images as AVIF, an icon in the same format fits the same setup. This page turns the largest image inside an .ico into an AVIF with its transparency kept, so the icon can travel through the same image handling as everything else.

At icon sizes, the bytes saved over WebP or PNG are small in absolute terms, so choose AVIF for consistency rather than size. Use Lossless mode to keep edges exact, because lossy AVIF can soften the one-pixel lines icons depend on. Then test it in the browsers your visitors use; Safari reads AVIF only from version 16.

Editing apps lag behind browsers on AVIF, so keep a PNG of the same icon for design work. A 16- or 32-pixel favicon looks blocky when enlarged in any format; the AI upscaler is the place to try when you need a larger version.

Frequently asked questions

How do I convert ICO to AVIF?: Upload your ICO file above. It is converted to AVIF automatically (change the output format or quality in the Settings tab if you need to), then click Download. There is nothing to install.
Does converting ICO to AVIF lose quality?: AVIF is lossy by default, so some fine detail is discarded to make the file smaller. Raise the quality or switch on lossless in Settings for a closer copy.
Will the AVIF keep the transparent background?: Yes. AVIF supports smooth, partial transparency, so transparent areas stay transparent.
ICO or AVIF: which should I use?: Use ICO for website favicons and Windows app or shortcut icons. Use AVIF for the smallest high-quality images for websites and apps. Keep in mind the main drawback of AVIF: it is slow to create and many editing apps and older devices can’t open it.
What is a ICO file?: An ICO file bundles one picture at several sizes, from 16 to 256 pixels, so browsers and Windows can pick the sharpest version for a tab, bookmark or desktop shortcut.
Is the ICO to AVIF converter free?: Yes. Convert, preview and download a single result without creating an account. Premium adds batch conversion (many files into one ZIP) and larger uploads.

What you can do with ICO to AVIF

Review the main capabilities before you begin.

Convert ICO files to AVIF online
Choose AVIF quality or switch to lossless
Switch to any other output format in Settings
Batch-convert many ICO files into one ZIP
Preview the result before you download

Use this tool

Settings reference

Available controls for ICO to AVIF.

Settings

Output formatDropdown: Chooses the file type you download. The page opens on its own output format; switch to any other format before converting.Options: JPGPNGWebPAVIFGIFTIFFBMPICOPDF
QualitySliderRange: 20–100 · Default: 90: For JPG, WebP, AVIF and image-to-PDF output: higher keeps more detail but makes a bigger file; 60–80 suits most photos. Documents (Publisher, XPS, EPS…) become PDFs with every page and sharp text, with no quality setting.
Lossless modeOn / Off: For WebP and AVIF output: keeps every pixel exactly (best for logos, graphics and transparency) at the cost of a larger file.
Background fillColor picker: For JPG, BMP and image-to-PDF output, which can’t store transparency: the colour that fills transparent areas (white by default).